Scoloporyptops rubiginosus C.L. Koch, 1878

Le, Son X., Schileyko, Arkady A. & Nguyen, Anh D., 2023, A review of Vietnamese Scolopocryptops Newport, 1844 (Chilopoda: Scolopendromorpha), with a description of S. hoanglieni n. sp. and the updated generic list of species, Zootaxa 5228 (4), pp. 441-447 : 414-418

Scoloporyptops rubiginosus C.L. Koch, 1878

Figs 2–4

Scolopocryptops rubiginosa C.L. Koch, 1878: 792 ;

Otocryptops rubiginosus: Kraeplin, 1903: 71–72 ;

Otocryptops rubiginosa: Attems, 1930: 259 ;

Otocryptops rubiginosus: Chamberlin & Wang, 1952: 179 ;

Otocryptops rubiginosa: Attems, 1953: 138 ;

Scolopocryptops rubiginosus: Schileyko, 1995: 73 ;

Scolopocryptops rubiginosus: Schileyko, 1998: 268 ;

Scolopocryptops rubiginosus: Schileyko, 2001: 427 ;

Scolopocryptops rubiginosa: Shelley, 2002: 66 ;

Scolopocryptops rubiginosus: Chao, 2002: 37 ;

Scolopocryptops rubiginosus: Song, Song & Zhu, 2004: 81 ;

Scolopocryptops rubiginosus: Schileyko, 2007: 73 ;

Scolopocryptops rubiginosus: Edgecombe et al., 2012: 770 ;

Scolopocryptops rubiginosus: Qiao, Xiao & Di, 2021: 28 ;

Scolopocryptops rubiginosus: Jonishi & Nakano, 2022: 2 .

Material. SON LA Province, Ta Xua NR: 1 spm (SVR. TX.2019.033), regenerating forest, 21.31472°N 104.52052°E, 1555 m a.s.l., 05.10.2019, col. Le X. Son ; 2 spms (SVR. TX.001, SVR. TX.007), bamboo forest, 21.35278°N 104.6740°E, 777 m a.s.l., 09.02.2017, col. Le X. Son, Ha K. Loan ; 1 spm (SVR. TX.005), mixed forest, 21.36528°N 104.6619°E, 831 m a.s.l., 09.022017, col. Vu T. Ha ; 1 spm (SVR. TX.015), 21.33978°N 104.6898°E, 09.022017, col. Nguyen D. Hung.

CAO BANG Province, Phia Oac — Phia Den NP: 1 spm (SVR. PO.020), natural forest, 22.60941°N 105.86414°E, 1709 m a.s.l., 12.07.2017, col. Le X. Son ; 1 spm (SVR. PO.213), natural forest, 22.600946°N 105.87015°E, 1605 m a.s.l., 04.06.2019, col. Le X. Son ; 1 spm (SVR. PO.236), mixed forest, 22.60321°N 105.87344°E, 1508 m a.s.l., 08.06.2019, col. Le X. Son ; 1 spm (SVR. PO.203.1), mixed forest, 22.60901°N 105.86814°E, 1596 m a.s.l., 04.06.2019, col. A. Abramov.

NGHE AN Province , Pu Hoat NR: 1 spm (SVR. PH.024), natural forest, 19.77022°N 104.78436°E, 1042 m a.s.l., 17.05.2019, col. Le X. Son ; 1 spm (SVR. PH.050), natural forest, 19.75619°N 104.78569°E, 1103 m a.s.l., 19.05.2019, col. Le X. Son ; 2 spms (SVR. PH.073, SVR. PH.074), mixed forest, 19.77069°N 104.78408°E, 1009 m a.s.l., 25.05.2019, col. Le X. Son & Ngo T. Dung .

QUANG NAM Province: 1 spm (SVR.STh.00085) Song Thanh NR, regenerated forest, 15.54008°N 107.38300°E, 1165 m a.s.l., 01.05.2019, col. Le X. Son.

KON TUM Province: 1 spm (SVR.TNh.116) Thach Nham forest , mixed forest, 14.71878°N 108.31711°E, 1129 m a.s.l., 04.06.2016, col. Le X. Son ; 1 spm (SVR.TNh.025) Thach Nham forest , natural forest, 14.75550°N 108.29761E, 1363 m a.s.l., 07.06.2016, col. Le X. Son ; 3 spms (SVR.TNh.028-029-030) Thach Nham forest , natural forest, 14.75397°N 108.29878E, 1350 m a.s.l., 07.06.2016, col. Le X. Son ; 1 spm (SVR.TNh.043) Thach Nham forest , mixed forest, 14.74731°N 108.30117°E, 1256 m a.s.l., 08.06.2016, col. Le X. Son ; 1 spm (SVR.TNh.046) Thach Nham forest , mixed forest, 14.74914°N 108.30017°E, 1241 m a.s.l., 08.06.2016, col. Le X. Son ; 1 spm (SVR.TNh.056) Thach Nham forest , mixed forest, 14.74328°N 108.30481°E, 1213 m a.s.l., 09.06.2016, col. Le X. Son ; 1 spm (SVR.TNh. T3 ) Thach Nham forest , natural forest, 14.72544°N 108.31506°E, 1035 m a.s.l., 08.05.2015, col. Nguyen Huu Thuc ; 1 spm (SVR. NL.030), Ngoc Linh NR, pine forest, 15.12594°N 107.81256°E, 1160 m a.s.l., 22.09.2019, col. Le X. Son.

HA TINH Province: 1 ad (Rc 6686 in ZMMU), Vu Quang, under log. 1200 m a.s.l., 08.08.1997, col. М. V. Kalyakin; 1 ad (Rc 6738 in ZMMU), Vu Quang village , М 13, 08.1997, col. М. V. Kalyakin .

Comparative material. 4 ad (Rc 7106 in ZMMU), Central China, Shaanxi Province, Panda area, Fo ping NR, 1600 m a.s.l., 06– 11.04.1999, col. V. Siniaev & A. Plutenko .

Diagnosis. 2 basal antennal articles virtually lacking setae; cephalic plate marginate laterally; tergites 8–18 with complete paramedian sutures, ultimate tergite with complete lateral margination; LBS 7 lacks spiracles; ultimate legs lacking setae (more rarely their distal articles setose), ultimate prefemur with two typical (ventral and dorsomedial) spinous processes.

Description of adult SVR.PO.020 [data from ZMMU specimens in square brackets where it differs].

Body length 36.8 mm, the width of LBS 10 ca 3.33 mm.

Antennae ( Figs 2 AB) composed of 17 articles (left one of 15 ones, it seems to be damaged /regenerated) of them 2 basal ones practically not setose [at least] dorsally, following articles densely covered by minute setae.

Cephalic plate ( Fig. 2A ) nearly as long as wide, not setose, [very sparsely] and definitely punctate, marginate laterally (posterior margination absent).

Forcipular segment ( Fig. 2B ): coxosternite, trochanteroprefemora and basal part of tarsungulae coarsely and sparsely punctate. Coxosternite with a [very] short median suture which reaches its middle [no more than 1/3 of coxosternite length, Fig. 2E ], several transverse sutures cross the median one in anterior third of coxosternite. Anterior margin of coxosternite strongly sclerotised and definitely divided by a median diastema into two standard low lobes (so it does not look strictly straight); process of trochanteroprefemur short, with a distinct basal suture; tarsungulum long, pointed.

Tergites 1–20 sparsely punctate, tergites 21–23 not punctate. Tergite 1 with anterior transverse suture, its anterior margin covered by cephalic plate ( Fig. 2A ). Tergite 2 short, half as long as tergite 3. Tergites 8–18 [7–19] with complete paramedian sutures, the following tergites lacking sutures ( Figs 2C , 3A ). Lateral margination ( Figs 2C , 3A ) incomplete [nearly complete] on tergites 4–22, only tergite 23 marginate completely. Tergite 23 nearly as long as wide, its posterior margin much convex in the middle ( Fig. 4A ). Tergites 2, 6–13, 15–19, 21 with some [lacking any] dark pigment (at least at posterior and lateral margins; Figs 2C , 3A ).

Sternites lacking paramedian sutures [with very shallow rounded depression in the center], 1–16 ones sparsely punctate ( Fig. 2D ), 2–20 with transverse sutures. Sternite 23 somewhat wider than long, trapeziform, its posterior margin slightly concave ( Fig. 4B ).

Coxopleuron ( Figs 3A–C ) densely covered by irregularly located coxal pores; coxopleural process [relatively short] long and pointed, much extended over the posterior margin of tergite 23.

Legs 1–21 with monopartite tarsus; legs ( Figs 2 CD, 3B) 1–22 with one tarsal spur, 1–19 with two tibial, 20–21 with one tibial and 22 lacking any spur; legs 1–22 with two pretarsal accessory spines. All legs not setose (in some specimens, tibia and tarsus of leg 22 sparsely setose) [leg 22 with both tibia and tarsus densely setose].

Ultimate legs ( Fig. 3D ) not setose (in some specimens, tibia and both tarsal articles densely setose, Fig. 3E ) [tibia and tarsal articles densely setose in both ZMMU specimens]; prefemur with two spinous processes of standard both structure and disposition—the larger ventral and smaller dorso-medial ones.

Variability. The setosity of tibia and tarsus of legs 22 and 23 varies considerably (from the total absence of setae to the presence of very dense ones). In all IEBR specimens from Northern Vietnam, the ultimate legs are practically not setose ( Fig. 3D ) while in the IEBR Highland’s material as well as in ZMMU’s one (two adults Rc 6686, 6738) from Central Vietnam (Ha Tinh Province) the ultimate both tibia and tarsus are densely setose ( Fig. 3E ). Variability of this character may also reflect a sexual dimorphism .

Remarks. According to Attems (1930) and Chao (2002), tergites 5–20 have two complete paramedian sutures, but Song et al. (2004) reported these sutures at tergites 4–21 and oblique sutures in the anterior corners of tergites 3–4. The recently studied specimens have complete paramedian sutures at tergites 8–18 ( Fig. 2C ).

Adult Rc 6686 (ZMMU) has LBS 7 with a spiracle at right pleuron only ( Fig. 2F )—this spiracle is much smaller than the well developed neighboring ones (on LBS 5 and 8, Fig. 2F ) and seems to be rudimentary. The same situation was described for S. nigrimaculatus Song, Song & Zhu, 2004 in its original description. This fact reduces the systematic value of as character as the number of spiracles, reducing the difference between S. rubiginosus and S. broelemanni esulcata (see Remarks to the latter).

Range. This species occurs in China, Taiwan, Korea, Japan and North America (Minnesota, Wisconsin to Texas) ( Shelley 2002; Chao & Chang 2003; Song et al. 2004). In Vietnam it was recorded from Vu Quang NP (Ha Tinh Province) only ( Schileyko, 2007), and the present study demonstrates that it widely occurs through this country ( Fig. 4 ).

Figures

FIGURES 2A–F. Scolopocryptops rubiginosus C.L. Koch, 1878; SVR.PO.020 A head and LBS 1, dorsally; B head and forcipular segment, ventrally; C LBS 6–10, dorsally; D LBS 6–10, ventrally; Rc 6738 (ZMMU) E head and forcipular segment, ventrally; Rc 6686 (ZMMU) F LBS 7, 8 (right side), laterally.

FIGURES 3A–E. Scolopocryptops rubiginosus C.L. Koch, 1878; SVR.PO.020 and SVR.TNh.046 A LBS 21–23, dorsally; B LBS 21–23, ventrally; C LBS 22–23, laterally; SVR.PO.020 (North Vietnam) D right ultimate leg, medially; SVR.TNh.046 (Central Vietnam) E right ultimate leg, medially.

FIGURE 4. Distribution of Scolopocryptops rubiginosus C.L. Koch, 1878 in Vietnam